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<title>DH_new_by_nid</title>
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<ul id="index">
  <li><a href="#NAME">NAME</a></li>
  <li><a href="#SYNOPSIS">SYNOPSIS</a></li>
  <li><a href="#DESCRIPTION">DESCRIPTION</a></li>
  <li><a href="#RETURN-VALUES">RETURN VALUES</a></li>
  <li><a href="#COPYRIGHT">COPYRIGHT</a></li>
</ul>

<h1 id="NAME">NAME</h1>

<p>DH_new_by_nid, DH_get_nid - get or find DH named parameters</p>

<h1 id="SYNOPSIS">SYNOPSIS</h1>

<pre><code> #include &lt;openssl/dh.h&gt;
 DH *DH_new_by_nid(int nid);
 int *DH_get_nid(const DH *dh);</code></pre>

<h1 id="DESCRIPTION">DESCRIPTION</h1>

<p>DH_new_by_nid() creates and returns a DH structure containing named parameters <b>nid</b>. Currently <b>nid</b> must be <b>NID_ffdhe2048</b>, <b>NID_ffdhe3072</b>, <b>NID_ffdhe4096</b>, <b>NID_ffdhe6144</b> or <b>NID_ffdhe8192</b>.</p>

<p>DH_get_nid() determines if the parameters contained in <b>dh</b> match any named set. It returns the NID corresponding to the matching parameters or <b>NID_undef</b> if there is no match.</p>

<h1 id="RETURN-VALUES">RETURN VALUES</h1>

<p>DH_new_by_nid() returns a set of DH parameters or <b>NULL</b> if an error occurred.</p>

<p>DH_get_nid() returns the NID of the matching set of parameters or <b>NID_undef</b> if there is no match.</p>

<h1 id="COPYRIGHT">COPYRIGHT</h1>

<p>Copyright 2017 The OpenSSL Project Authors. All Rights Reserved.</p>

<p>Licensed under the OpenSSL license (the &quot;License&quot;). You may not use this file except in compliance with the License. You can obtain a copy in the file LICENSE in the source distribution or at <a href="https://www.openssl.org/source/license.html">https://www.openssl.org/source/license.html</a>.</p>


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